Again with spoilers in the title. I mean, the book series isn't Harry Potter or anything so I can understand it but some of them could be a little more subtle.

This is the first (and only time that I can recall) that a KASU was addressed by Applegate. It's not even a huge one unless you're really into dinosaurs. I seriously have no idea what era which dinosaurs lived in... my extent of dinosaur knowledge is having watched The Land Before Time 10000 times as a kid.

If you like the Megamorphs you'll probably like this one. I enjoy the multiple narrators and side stories like this don't bother me as much when they're clearly removed from the main series.

Just a couple of questions this time.

Jake is the only Animorph to experience a Sario Rip. At the end of The Forgotten (book 11) Ax explained that Jake wouldn't be able to morph any of the animals he acquired in the Sario Rip because he erased that timeline so he never was actually there (weird syntax, sorry).

The situation here is a little stickier because clearly the Animorphs did go back in time and set the history of the world as they know it into motion, so technically they were there and technically they acquired those dinosaurs. There might be some limit to the morphing technology - clearly time travel did something to it because morphing didn't heal Tobias in the Sario Rip - that prevented them from carrying the dinosaur DNA back with them. I wish we had more of an explanation in the book but it's just hand waved away by Jake and Cassie at the end.

Also Marco says that a creature must be alive for them to acquire it but even dead creatures have DNA. So either Marco doesn't understand their acquiring abilities and Ax just didn't correct him here or there's some reason the acquiring technology won't work if the creature being acquired is dead. Not sure that makes sense, but we just have to go with it since no explanation is given.